gtk:action-is-important (object)

object -- a gtk:action object
is-important -- true to make the action important

The accessor for the is-important slot of the gtk:action class gets or sets whether the action is important or not. This attribute is used primarily by toolbar items to decide whether to show a label or not. When true, toolitem proxies for this action show text in :both-horiz mode. The gtk:action-is-important function has been deprecated since version 3.10 and should not be used in newly written code.